We're told the 16-year-old girl was speeding up Coldwater Canyon when she lost control and nearly slammed into the mountain. She jerked the wheel and overcompensated, crashing in to the SUV.

As we reported, Calvin was taken to a local hospital for a facial laceration. Law enforcement sources tell us he asked for a private room, and when they couldn't accommodate him, he got off the gurney and left, against medical advice. A rep for Calvin disputes that and says he was cleared to leave.

As for the girl who was ejected, she suffered a broken pelvis ... she should be ok.